Dear Savvy Senior: I need some help understanding my medical bills from my knee replacement surgery earlier this year. My wife and I live on a pretty tight budget so I like to keep track of our costs as closely as possible. But the bills I’ve received are vague and confusing, and we think we’re being overcharged. What can you tell us? — Trying To Recover

Dear Trying: Errors and overcharging have become so commonplace on medical bills today that double-checking them is a very smart move that may save you some money. Here are some tips and tools that can help.